Tissue regulation of dendritic cells : with focus on chemokines, function and migration
Author: Nguyen Hoang, Anh Thu
Date: 2013-06-05
Location: Alfred Nobels Allé 8, plan 4, sal Solen 4V, Karolinska Universitetssjukhuset, Huddinge
Time: 09.00
Department: Inst för medicin, Huddinge / Dept of Medicine, Huddinge
Abstract
Tissue-specific cells, such as fibroblasts and epithelial cells in local microenvironments have been recognized to influence the function and phenotype of hematopoietic cells, such as dendritic cells (DC). The interaction and cooperation between DC and the cells of the tissue is important for the maintenance of immune homeostasis as well as orchestrating immune responses against pathogens. However, a majority of studies on human DC are performed under conditions absent of a relevant physiological milieu allowing interactions between different cell types. Thus, there is a need to develop in vitro human tissue models with immune cells that can capture cellular responses under conditions similar to those found in real tissue.
In my thesis work, I have developed a human three-dimensional (3D) lung tissue model that has morphological and functional features mimicking those of human lung epithelial tissue. The model has a stratified epithelial layer with human DC that are situated closely to the epithelium and an underlying collagen matrix rich in fibroblasts. We have found that the lung tissue model supports DC survival for at least eleven days in the absence of exogenous growth factors. The tissue model also regulates chemokine production by DC leading to enhanced production of CCL18 and downregulation of CCL17 and CCL22, which resemble chemokine production under physiological conditions in lung tissue. In addition, using live cell imaging, we could observe that stimulation with toll-like receptor-ligands and CCL2 attracted DC to the epithelial layer as well as increased their speed and their ability to survey a larger area in the tissue model. We also found, using our newly established 3D tumour spheroid tissue model of non-small cell lung cancer, that DC are recruited to the tumour area and engulf tumour cells more readily than normal epithelial cells.
Another major focus of this thesis work is the study of stromal cell-derived chemokines supporting regulatory DC development during L. donovani infection. Stromal cells are known to regulate hematopoiesis in the bone marrow and spleen by secretion of chemokines, cytokines and growth factors. Studies have shown that murine splenic stromal cells have the ability to support differentiation of hematopoietic stem and progenitor cells (HSPC) into regulatory DC and this ability is enhanced during L. donovani infection. We further showed that stromal cell-derived chemokines CXCL12 and CCL8 cooperate to recruit HSPC with the ability to differentiate into regulatory DC. In addition, we observed that direct infection of MBA-1 cells by L. donovani enhanced their ability to support regulatory DC as well as their ability to produce CCL8. Interestingly, CCL8 expression was strongly induced in splenic stromal cells of mice infected with L. donovani, which enhanced their ability to attract HSPC. Our findings suggest that L. donovani infection modulates the ability of stromal cells to recruit and support HSPC differentiation into regulatory DC, and this may be a mechanism used by the parasite to establish persistent infection.
Together, the studies in this thesis show the impact of tissue specific cells on DC differentiation and function, and highlights the importance of taking into account tissue-specific components when studying DC biology.
In my thesis work, I have developed a human three-dimensional (3D) lung tissue model that has morphological and functional features mimicking those of human lung epithelial tissue. The model has a stratified epithelial layer with human DC that are situated closely to the epithelium and an underlying collagen matrix rich in fibroblasts. We have found that the lung tissue model supports DC survival for at least eleven days in the absence of exogenous growth factors. The tissue model also regulates chemokine production by DC leading to enhanced production of CCL18 and downregulation of CCL17 and CCL22, which resemble chemokine production under physiological conditions in lung tissue. In addition, using live cell imaging, we could observe that stimulation with toll-like receptor-ligands and CCL2 attracted DC to the epithelial layer as well as increased their speed and their ability to survey a larger area in the tissue model. We also found, using our newly established 3D tumour spheroid tissue model of non-small cell lung cancer, that DC are recruited to the tumour area and engulf tumour cells more readily than normal epithelial cells.
Another major focus of this thesis work is the study of stromal cell-derived chemokines supporting regulatory DC development during L. donovani infection. Stromal cells are known to regulate hematopoiesis in the bone marrow and spleen by secretion of chemokines, cytokines and growth factors. Studies have shown that murine splenic stromal cells have the ability to support differentiation of hematopoietic stem and progenitor cells (HSPC) into regulatory DC and this ability is enhanced during L. donovani infection. We further showed that stromal cell-derived chemokines CXCL12 and CCL8 cooperate to recruit HSPC with the ability to differentiate into regulatory DC. In addition, we observed that direct infection of MBA-1 cells by L. donovani enhanced their ability to support regulatory DC as well as their ability to produce CCL8. Interestingly, CCL8 expression was strongly induced in splenic stromal cells of mice infected with L. donovani, which enhanced their ability to attract HSPC. Our findings suggest that L. donovani infection modulates the ability of stromal cells to recruit and support HSPC differentiation into regulatory DC, and this may be a mechanism used by the parasite to establish persistent infection.
Together, the studies in this thesis show the impact of tissue specific cells on DC differentiation and function, and highlights the importance of taking into account tissue-specific components when studying DC biology.
List of papers:
I. Anh Thu Nguyen Hoang, Puran Chen, Julius Juarez, Patty Sachamitr, Bo Billing, Lidija Bosnjak, Barbro Dahlén, Mark Coles and Mattias Svensson. Dendritic cell functional properties in a three-dimensional tissue model of human lung mucosa. Am J Physiol Lung Cell Mol Physiol. 2012, 302: 226–237.
Fulltext (DOI)
Pubmed
View record in Web of Science®
II. Anh Thu Nguyen Hoang, Puran Chen, Kari Högstrand, John Lock, Alf Grandien, Mark Coles and Mattias Svensson. Live imaging analysis of dendritic cell migrating behaviour under the influence of immune stimulating reagents in an organotypic model of human lung. [Manuscript]
III. Puran Chen, Anh Thu Nguyen Hoang and Mattias Svensson. Advances in evaluation of dendritic cell behaviour and function in human lung cancer using an organotypic-based epithelial spheroid model of non-small cell lung cancer. [Manuscript]
IV. Anh Thu Nguyen Hoang, Hao Liu, Julius Juarez, Naveed Aziz, Paul M. Kaye and Mattias Svensson. Stromal cell-derived CXCL12 and CCL8 cooperate to support increased development of regulatory dendritic cells following Leishmania infection. The Journal of Immunology. 2010, 185: 2360–2371.
Fulltext (DOI)
Pubmed
View record in Web of Science®
I. Anh Thu Nguyen Hoang, Puran Chen, Julius Juarez, Patty Sachamitr, Bo Billing, Lidija Bosnjak, Barbro Dahlén, Mark Coles and Mattias Svensson. Dendritic cell functional properties in a three-dimensional tissue model of human lung mucosa. Am J Physiol Lung Cell Mol Physiol. 2012, 302: 226–237.
Fulltext (DOI)
Pubmed
View record in Web of Science®
II. Anh Thu Nguyen Hoang, Puran Chen, Kari Högstrand, John Lock, Alf Grandien, Mark Coles and Mattias Svensson. Live imaging analysis of dendritic cell migrating behaviour under the influence of immune stimulating reagents in an organotypic model of human lung. [Manuscript]
III. Puran Chen, Anh Thu Nguyen Hoang and Mattias Svensson. Advances in evaluation of dendritic cell behaviour and function in human lung cancer using an organotypic-based epithelial spheroid model of non-small cell lung cancer. [Manuscript]
IV. Anh Thu Nguyen Hoang, Hao Liu, Julius Juarez, Naveed Aziz, Paul M. Kaye and Mattias Svensson. Stromal cell-derived CXCL12 and CCL8 cooperate to support increased development of regulatory dendritic cells following Leishmania infection. The Journal of Immunology. 2010, 185: 2360–2371.
Fulltext (DOI)
Pubmed
View record in Web of Science®
Institution: Karolinska Institutet
Supervisor: Svensson, Mattias
Issue date: 2013-05-16
Rights:
Publication year: 2013
ISBN: 978-91-7549-176-9
Statistics
Total Visits
Views | |
---|---|
Tissue ...(legacy) | 1428 |
Tissue ... | 444 |
Total Visits Per Month
September 2023 | October 2023 | November 2023 | December 2023 | January 2024 | February 2024 | March 2024 | |
---|---|---|---|---|---|---|---|
Tissue ... | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
File Visits
Views | |
---|---|
Thesis_Hoang.pdf(legacy) | 538 |
Spikblad_Hoang.pdf(legacy) | 277 |
Thesis_Hoang.pdf | 192 |
Spikblad_Hoang.pdf | 30 |
Spikblad_Hoang.pdf(legacy) | 16 |
Spikblad_Hoang.pdf.txt(legacy) | 3 |
Thesis_Hoang.pdf.txt(legacy) | 2 |
Spikblad_Anh_Thu.pdf(legacy) | 1 |
Top country views
Views | |
---|---|
United States | 581 |
Sweden | 188 |
Germany | 184 |
China | 163 |
Denmark | 125 |
South Korea | 52 |
Russia | 50 |
France | 17 |
Australia | 16 |
United Kingdom | 13 |
Top cities views
Views | |
---|---|
Copenhagen | 58 |
Ashburn | 56 |
Seoul | 46 |
Stockholm | 46 |
Kiez | 42 |
Sunnyvale | 39 |
Beijing | 33 |
Moscow | 21 |
Romeo | 21 |
Ballerup | 20 |